kimball



A. H. 85 G. H. KIMBALL. 'Roa'd Scraper and Grader. 010231589.-

Patented Aug. 24,1880,

' I INVENTOR:

N.PEfERS, FHOTWUTMOGHIPHQL WASHINGYDN D UNITED STATES NLQW ALONZO H. KIMBALL AND CHARLES H. KIMBALL, OF LITTLETON, MASS.

ROAD SCRAPER AND GRADER.

SPECIFICATION forming part of Letters Patent No. 231,58g9, dated August 24, 1880,

l Application filed December 18, 1879.

To all whom it may concern:

Be it known that we, ALONZO HAYXVARD KIMBALL and CHARLES HERBERT KIMBALL, of Littleton, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Road Scrapers and Graders, of which the following is a specification.

Figure l is a side elevation of theimprovement. Fig. 2 is a bottom view. Fig. 3 is a sectional end elevation taken through the line arm, Fig. 2. Fig. 4 is a sectional elevation taken through the line y 3 Fig. 2. Fig.5 is a side elevation of one of the adjustable braces.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish road scrapers and graders so constructed that they maybe readily adjusted to cutthe ground to any desired depth, to give any required crown to the road, to move the soil without becoming clogged, and which will be held lirmiy against side movement.

The invention consists in the combination, with the scraper, of appliances for connecting the scraper with a wagon, and also for holding, adjusting, gaging, and controlling the scraper, as will he hereinafter fully described.

A represents the rear wheels, 13 the forward wheels, 0 the rear axle, D the forward axle, E the forward bolster, and F the platform, of a wagon, which may be an ordinary wagon or a wagon built expressly for the machine. To the center of the forward axle, D, is pivoted the forward end or angle of a triangular frame, Gr.

H is the plank or stock of the scraper, which is hinged at its upper edge, and in an inclined position, to the rear angles of the frame G by straps I and eyebolts J, or other suitable means. To the forward side of the plank H is bolted or otherwise secured the steel plate K. To the forward side of the forward end of the scraper H K is secured the plow L, which is made with a vertical landside, a tapering point, and a concaved mold-board, the outer end of the mold-board being so formed as to fit snugly against the forward side of the steel plate K. Upon the rear side of the lower part of the mold-board of the plow L is formed, or to it is attached, a lug, M, which is secured by a split pin, N, to a lug, 0, formed upon the forward end of a short bar, P. The bar P crosses and rests against the lower edge of the scraper H K, and has a hole in its rear end to receive the bolt Q, which passes up at the rear side of the scraper H K, through a hole in the rear end of the bar R, and has a nut screwed upon its upper end. The bar It crosses and rests upon the upper edge of the scraper H K, has a lug formed upon its lower .side to rest against the plank H, and its forward end is bolted orotherwisc secured to the top of the plow L.

With this construction the plow L can be conveniently attached when required for use, and detached when not required for use.

To the lower part of the rear side of the plank H, near its ends, are attached socketblocks S, in which work the balls T, formed upon the lower ends of the lower parts, U, of the braces U V. The upper parts, V, of the braces U V have balls W formed upon their upper ends, which balls W work in socketblocks X, attached to the rearwardly-projecting ends of the'side bars of the triangular frame G. The parts U V of the braces overlap each other, have teeth or corrugations Y formed upon their adjacentsides, and are slotted longitudinally to receive the bolts Z, by which they are locked together. The braces U V support the lower part of the scraper against the draft-strain, and may be adjusted in length to give more or less pitch to the scraper H K, as may be required.

By this construction the ball-and-socket joints S T and X W give a firm and square bearing to the braces UV, however they may be adjusted.

To the rear bar of the frame G is attached the lower end of a standard, a, which passes up through holes in the cross-bars b c of the frame d, which is bolted to the frame or platform F.

With this construction the scraper is held firmly in place, so that it cannot run into the gutter or to the side of the machine, but must move forward upon the line of draft.

The holes through the cross-bars b c of the frame at may be faced with metal to prevent wear. To the forward part of the upper edge of the stock or plank His hinged, by Ustraps or elevises e, the lower end of a bar,f, the upper end of which is slotted or has straps attached to the opposite sides of its upper end, to receive the forward end of the lever g. Several holes are formed in the slotted upper end of the barf, to receive the pivoting pin, bolt, or screw by which the lever g is pivoted to the said bar], so that the said lever 9 can be adjusted as required. The lever g is pivoted to a support, h, attached to the frame cl. The rear end of the lever 1 projects over the rear part of the platform F, so that it can be readily operated by an attendant standing upon the said rear part of the platform F, to raise and lower the forward end of the scraper, as may be required. Thelever g passes through a guide-slot in a bar or keeper, t', attached to a post of the frame 01. The levergis provided with alever spring-pawl,j, to engage with the teeth ofatoothed barorsegment, 70, attached to the frame (I. to hold the scraper securely in any position into which it has been adjusted.

To the rear part of the upper edge of the stock or plank H is hinged, by U straps or clevises l, the lower end of a bar, m, the upper end of which is slotted or has straps attached to its opposite sides to receive the lever 72. Severalholes are formed in the upperslotted end of the bar m, to receive the pivoting pin, screw, or bolt, so that the said pivot maybe adjusted as required. The lever 42 is pivoted to a support, 0, attached to the frame (I, and the forward end of the said lever passes through a guide-slot in a bar or keeper, 1), attached to the forward post of the frame d.

With this construction the rear end of the scraper can be raised and lowered by operating the lever n to give any desired elevation to the crown of the road.

The forward end of the lever 02 is held from rising and allowing therear end of the scraper to drop below the desired point by the end of the rod g, which passes through one or another of the holes in the keeper 1) and the post of 5 the frame d, above the said lever n.

The rod q is bent to the rearward, so that it can be readily operated by the attendant standing upon the rear part of the platform 13. When it is only necessary to remove ridges and fill ruts in the road-bed the plow L may V be detached, the said plow L being only required when soil is to be taken from the side of the road and deposited upon the road-bed.

We do not claim raising and lowering a scraper-plate by means of levers pivoted to the frame of a truck.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. The combination, with scraper H K, of the plowing M, the bar P, havinglug 0, connected with lug M by split pin N, the bolt Q, carrying nut, and the bar R, having a lug on its lower side, as and for the purpose set forth.

2. The combination, with the frame G, pivoted to axle D, and frame d, having cross-bars b c, of the single standard a, attached to the rear end of said frame G, and passing up through said cross-bars, as and for the purpose specified.

3. In a road scraper and grader, the combination, with the scraper H K and the frame G, of the extension-braces UV, provided with ball-and-socket bearings W X and T S at their ends, substantially as herein shown and described, to give the braces a firm support at whatever pitch the scraper may be adjusted, as set forth 4. In a road scraper and grader, the combination, with the scraper-plate, of the triangular frame G, pivoted to the front axle and to 

